Nakano Note (Nakano wa Kangaeru noda) NK 3424 233P/La Sagra
The following improved orbital elements, by T. Kobayashi, are from 58 observations 2005 to 2010. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.66 arc second. See the previous orbits in NK 1881 and NK 2309. Epoch = 2010 Mar. 25.0 TT T = 2010 Mar. 12.40873 +/- 0.00094 (m.e.) TT Peri. = 27.13432 +/- 0.00026 Node = 74.99704 +/- 0.00010 (2000.0) Inc. = 11.27482 +/- 0.00004 q = 1.7914331 +/- 0.0000034 AU e = 0.4096299 +/- 0.0000010 a = 3.0344239 +/- 0.0000076 AU n' = 0.18646173 +/- 0.00000069 P = 5.286 +/- 0.0000200 years T = 2004 Nov. 15.93709 TT Epoch = 2004 Nov. 11.0 TT Peri. = 26.71151 e = 0.4009248 Node = 75.20993 (2000.0) a = 3.0512343 AU Inc. = 11.25790 n'= 0.18492292 q = 1.8279187 AU P = 5.330 years The predicted orbit for the 2020 return is as follows. Note the comet was missed in 2015 return: T = 2020 Oct. 1.67071 TT Epoch = 2020 Sept.28.0 TT Peri. = 27.05748 e = 0.4118324 Node = 74.92692 (2000.0) a = 3.0308886 AU Inc. = 11.28369 n'= 0.18678806 q = 1.7826704 AU P = 5.277 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2005/ 091119 J75 0.7- 0.8- 100206 C51 0.9+ 0.1+ 050209 G96 0.2- 0.1- 091119 J75 0.2+ 0.2- 100207 C51 0.2+ 0.3- 050209 G96 0.0 0.1- 091121 703 1.1- 0.6+ 100207 C51 1.0+ 0.2- 050209 G96 0.4- 0.1+ 091121 703 0.1- 0.5- 100207 C51 0.1+ 0.3- 050209 G96 0.1- 0.1+ 091121 703 0.5- 0.3- 100207 C51 0.4+ 0.9- 050508 704 0.1+ 0.6+ 091121 703 0.4- 0.2+ 100207 C51 0.0 1.1- 050508 704 0.4- 1.9+ 091121 703 0.4- 0.2- 100213 291 0.6- 1.2- 050508 704 0.3- 0.6+ 091121 703 0.8+ 0.2+ 100213 291 0.0 0.1+ 050510 704 1.1+ 1.0+ 091121 703 0.6- 1.1+ 100213 291 0.4+ 0.4- 050510 704 0.6+ 0.7+ 091210 703 (2.5+ 0.6+) 100215 H01 0.0 0.1- 050510 704 1.3+ 1.1+ 091210 703 (2.6+ 0.1+) 100215 H01 0.0 0.2- 050510 704 1.0+ 0.9+ 091210 703 (2.0+ 0.4+) 100215 H01 0.1+ 0.4- 2009/ 091210 703 (2.5+ 1.0+) 100216 291 0.5+ 0.2- 091114 704 0.2- 0.1+ 2010/ 100216 291 0.1- 0.1+ 091114 704 0.3- 0.2+ 100205 C51 1.5+ 0.5+ 100216 291 0.6+ 0.1- 091114 704 1.0+ 1.5+ 100206 C51 0.9+ 0.4+ 100216 291 1.4- 0.3+ 091114 704 1.1- 1.5+ 100206 C51 0.7+ 1.0- 100216 291 0.4+ 0.5- 091119 704 1.3- 0.7+ 100206 C51 1.0+ 1.1+ 100216 291 0.1+ 0.1- 091119 704 0.8- 0.2+ 100206 C51 0.1+ 0.1+ 100218 H01 0.2+ 0.3- 091119 704 0.7+ 0.4- 100206 C51 0.8+ 0.7- 100218 H01 0.0 0.4- 091119 704 0.0 1.5+ 100206 C51 0.0 0.6- 100218 H01 0.1+ 0.4- 091119 J75 0.6- 0.1+ 100206 C51 0.8+ 0.3- ( ) -------- Rejected Obs.
Associate of the CBAT Late edition Syuichi Nakano 2017 July 9